I get your point and think in a similar way. The difference between AI and the coconuts is -> there is no way deaths by coconuts increase by 10000000x, but for AI it's possible.

The reasons we have not - and probably will not - remove obvious bad causes is, that a small group of people has huge monetary incentives to keep the status quo.

It would be so easy to e.g. reduce the amount of sugar (without banning it), or to have a preventive instead of a reactive healthcare system.